Method of measuring after-glow of stimulable phosphor sheet, and

Details Method of measuring after-glow of stimulable phosphor sheet, and Method of measuring after-glow of stimulable phosphor sheet, and

1987-06-17

1989-08-29

Hannaher, Constantine

Radiant energy

Automatic/serial detection of similar sources

2504841, G03B 4200

Patent

active

048619949

ABSTRACT:
A method of measuring an after-glow of a stimulable phosphor sheet comprises the step of detecting an instantaneous light emission after-glow emanated by the stimulable phosphor sheet carrying a radiation image stored thereon by use of a photodetector when the stimulable phosphor sheet is being conveyed toward a system for final read-out after preliminary read-out is finished, thereby measuring the level of the after-glow. A method of adjusting radiation image read-out conditions comprises the steps of creating a histogram of preliminary read-out image signals obtained by preliminary read-out, detecting the instantaneous light emission after-glow by a photodetector, obtaining a signal Sx representing the level of the instantaneous light emission after-glow, and adjusting final read-out conditions and/or image processing conditions based on a value calculated by subtracting the value of the signal Sx from a characteristic value of the preliminary read-out image signals in the histogram.

REFERENCES:
patent: 4496973 (1985-01-01), Horikawa et al.
patent: 4571493 (1986-02-01), Horikawa
patent: 4582988 (1986-04-01), Aagano
patent: 4638162 (1987-01-01), Tanaka et al.
patent: 4749861 (1988-06-01), Watanabe et al.

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